La présente invention concerne un dispositif permettant le remplacement d'une partie (le nucléus) des disques intervertébraux par un matériau implanté. The present invention relates to a device for replacing a part (the nucleus) of the intervertebral discs with an implanted material.
Un polyuréthane (10) est polymérisé directement dans la cavité (4) crée à l'occasion d'une nucléotomie ou d'une chémonucléolyse. A polyurethane (10) is polymerized directly in the cavity (4) created during a nucleotomy or a chemonucleolysis.
Ce dispositif vise à rétablir les fonctions de mobilité et d'amortissement des disques lésés sans mettre en place une prothèse totale du disque intervertébral. This device aims to restore the mobility and damping functions of the injured discs without installing a total prosthesis of the intervertebral disc.
Le dispositif comporte un sac (1) en polyéthylène étanche et vide d'air, fixé sur l'extrémité (8) du tube (2). The device comprises a bag (1) of airtight and airtight polyethylene, fixed to the end (8) of the tube (2).
Le tube (2) présente une extrémité (8) et une extrémité (9). The tube (2) has an end (8) and an end (9).
Le tube (2) présente à son extrémité (8) une résistance chauffante (3) permettant la fermeture du sac (1) par thermo-soudure
Le tube (2) est introduit par le trocart (5) dans la cavité (4) résultant de l'élimination du nucléus
La voie d'accès est la meme que celle utilisée pour la nucléotomie ou la chémonucléolyse.The tube (2) has at its end (8) a heating resistance (3) allowing the closure of the bag (1) by heat sealing
The tube (2) is introduced through the trocar (5) into the cavity (4) resulting from the elimination of the nucleus
The access route is the same as that used for nucleotomy or chemonucleolysis.
Un mélange (7) de monomères et de catalyseurs est injecté au travers du tube (2) à l'intérieur du sac (1) afin de combler la cavité (4). A mixture (7) of monomers and catalysts is injected through the tube (2) inside the bag (1) in order to fill the cavity (4).
Après soudure du sac (1), grâce à la résistance (3), la polymérisation se poursuit à 370 pendant 30 minutes environ. After sealing the bag (1), thanks to the resistance (3), the polymerization continues at 370 for approximately 30 minutes.
Elle aboutit à la formation d'un polyuréthane (10) selon la formule de la figure 3.It results in the formation of a polyurethane (10) according to the formula in FIG. 3.
Le tube et le trocart sont ensuite retirés. The tube and the trocar are then removed.
Une variante consiste à injecter des microbilles (11) du polyuréthane (10) à l'intérieur du sac (1). A variant consists in injecting microbeads (11) of polyurethane (10) inside the bag (1).
La figure 1 représente en coupe le tube (2) et le trocart (5). Figure 1 shows in section the tube (2) and the trocar (5).
La figure 2 représente le disque intervertébral en coupe axiale et les trois étapes de la polymérisation in situ dans la cavité (4). Figure 2 shows the intervertebral disc in axial section and the three stages of in situ polymerization in the cavity (4).
La figure 3 représente la réaction chimique aboutissant à la formation du polyuréthane (10). Figure 3 shows the chemical reaction leading to the formation of polyurethane (10).
La figure 4 représente la variante. Figure 4 shows the variant.
Le sac (1) est constitué d'un film de polyéthylène imperméable dont l'épaisseur est de 0,1 mm. Son volume atteint 2 cm3 environ après expansion. The bag (1) consists of a waterproof polyethylene film whose thickness is 0.1 mm. Its volume reaches approximately 2 cm3 after expansion.
Le tube (2) a une dimension de 25 cm de longueur pour un diamètre de 3 mm. Il peut etre réalisé en acier inoxydable. The tube (2) has a dimension of 25 cm in length for a diameter of 3 mm. It can be made of stainless steel.
La réaction chimique aboutissant à la formation du polyuréthane (10) résulte du mélange (7) suivant
Hylene W (marque déposée) I NCO.The chemical reaction leading to the formation of the polyurethane (10) results from the following mixture (7)
Hylene W (registered trademark) I NCO.
Butanediol 1-4 0,5 OH. Butanediol 1-4 0.5 OH.
Polymeg 1000 (marque déposée) 0,5 OH. Polymeg 1000 (registered trademark) 0.5 OH.
Dilaurate de dimethyl étain 0,02 X du mélange. 0.02 X dimethyl tin dilaurate of the mixture.
Le dispositif peut etre réalisé sous forme d'un kit stérile, pret à l'emploi, permettant le réchauffement préalable des monomères utilisés. The device can be produced in the form of a sterile kit, ready to use, allowing the prior heating of the monomers used.
Le dispositif, selon l'invention, est destiné à etre placé par des médecins et chirurgiens après nucléotomie ou chémonucléolyse dans le but de rétablir la fonction articulaire intervertébrale. The device according to the invention is intended to be placed by doctors and surgeons after nucleotomy or chemonucleolysis in order to restore the intervertebral joint function.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8816184AFR2639823A1 (en) | 1988-12-06 | 1988-12-06 | Replacement of the nucleus of the intervertebral disc by a polyurethane polymerised in situ |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8816184AFR2639823A1 (en) | 1988-12-06 | 1988-12-06 | Replacement of the nucleus of the intervertebral disc by a polyurethane polymerised in situ |
| Publication Number | Publication Date |
|---|---|
| FR2639823A1true FR2639823A1 (en) | 1990-06-08 |
| FR2639823B1 FR2639823B1 (en) | 1994-12-23 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8816184AGrantedFR2639823A1 (en) | 1988-12-06 | 1988-12-06 | Replacement of the nucleus of the intervertebral disc by a polyurethane polymerised in situ |
| Country | Link |
|---|---|
| FR (1) | FR2639823A1 (en) |
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